Step 4: Updates
I stuck the tubing end into the pull-cap and hot glued it in place. After several rides, I can say that it works GREAT, no leakage at all! Plus it was free.
The inside end of the tubing would get stuck to the bottle wall by my suction. I cut the end of the tube to a V and also cut a hole in the side of the tube, about 1/4" from the end. This keeps the tube from being sealed off by contact with the bottle.
I also made a hydration pack from some backpack parts I had laying around. (from a daypack on it's way to the trash). Looks professional, Someday I'll post it too.